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    <title>Document</title>
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<body>
    
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<script>
    //对象转查询字符串
    function objToSearchString(obj){
        var str =''
        for(var key in obj ){
            str +=`${key}=${obj[key]}&`
        }
        return str.slice(0,str.length-1)
    }
    //封装ajax函数
    function ajax(method,url,params,cb){
        var xhr=new XMLHttpRequest
       // 2、配置请求对象
        xhr.open(method,url+"?"+objToSearchString(params))
    
        //设置回调函数
        xhr.onreadystatechange=function(){
            if(xhr.readyState==4){
                cb(JSON.parse(xhr.responseText))
            }
        }
        xhr.send()
}
ajax('get','https://yantianfeng.com/api/emotion',{page:1,count:5},function(data){
    console.log(data);
})



</script>
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